Malicious PDF — malware analysis report

Static analysis result for SHA-256 526e3a51ce942b1f…

MALICIOUS

PDF

37.5 KB Authoring application: ImageMagick
MD5: 1cb036efdaeb230cce86274be16b4fc7 SHA-1: bcf2195f11119b3c7fb98c50f519adff634067df SHA-256: 526e3a51ce942b1fed51f2bdd19b3fe9551d94191717e0cdef62edda78556058
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded external links, characteristic of a link farm designed to direct users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent. The embedded URLs are the primary IOCs, likely leading to further stages of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://susanmastalsfoundation.org/uploads/1/3/0/5/130588407/fitewomafe.pdf
    • http://taleday.org/uploads/1/3/0/3/130379803/5640381.pdf
    • http://ignitefitness.info/uploads/1/3/0/5/130588418/wuwidivososam-bijumal.pdf
    • http://natureallbody4ever.com/uploads/1/3/0/7/130776823/d484c7f78f5.pdf
    • http://dokkanaccountseller.com/uploads/1/3/0/5/130543010/8df476817bb.pdf
    • http://midwesthomebuild.com/uploads/1/3/0/4/130476208/7113878.pdf
    • http://renibickel.com/uploads/1/3/0/6/130621871/mejotiwowunonug.pdf
    • http://nigelcrossan.com/uploads/1/3/0/2/130272330/wamimazoxalegiken.pdf
    • http://res.boda-hilda-avelino.com/uploads/2020/01/28/tazulirawu.pdf
    • http://aromascrips.com/uploads/1/3/0/3/130323789/b53ea2933.pdf
    • http://mmflackdesigns.com/uploads/1/3/0/5/130551014/4522917.pdf
    • http://amicoffeecompany.com/uploads/1/3/0/2/130287867/9886808.pdf
    • http://tasmaniadisabilitylobby.com.au/uploads/1/3/0/6/130605448/130605448.html#sql+query+to+insert+pdf+file

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000130e.bin
9866b6da30e047a2c4240b5ac7482ddf2d971511c85777cb8b2dcaad3237d70b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x130E 8312 bytes

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